Hi, I am trying to set up an SD card reader and MAX6675 thermocouple on an UNO R3. I have the two SPI units sharing the same SCLK, MISO with the SD card on CS pin 10 and the MAX 6675 on CS 2. The Thermocouple seems to work fine but as soon as I initialise the SD card I get zero returned by the the…

SD locks out MAX6675 thermocouple once initialised

Robin2 March 27, 2017, 4:52pm 3

I think there is a problem with some SD Card devices. See this Post

...R

Topic		Replies	Views
Problems with Arduino Uno, SPI microSD module and SPI MAX6675 Programming	8	1514	January 31, 2023
Data logging using thermocouple MAX6675 Programming	5	490	February 17, 2024
Sd card and Termocuple with MAX6675 Storage	1	1338	May 6, 2021
MAX6675 Module and SD Card Module Pin Connections and Arduino Mega General Guidance	2	218	November 29, 2024
ESP32: SD-Card Module + MAX6675 on HSPI Bus (Known SD Card Problem?) Programming	5	1571	May 6, 2021